Red Bull advisor Helmut Marko has said that Fernando Alonso and Lewis Hamilton are the only two drivers the team considers as serious rivals for this year's championship.

"There are two people that we fear for this world title," Marko told the APA news agency. "They are Fernando Alonso, because he is at his absolute peak, and Lewis Hamilton. What the others are doing bothers us not so much."

Red Bull's RB6 car has been the class of the field in 2010, taking three wins and six pole positions. As a result Marko thinks the team and its drivers, Mark Webber and Sebastian Vettel, are rightly the championship favourites.

"With the package that we have, we clearly have to be going for the championship - and in the coming years," he added. "We have the people we need and the necessary tools to adapt to changes. We have had a winning car also in 2008 and 2009, so you can't say that it's a fluke when you're building a top car in three consecutive years."

Webber and Vettel currently lead the drivers' championship on equal points while Red Bull is 20 points clear of Ferrari in the constructors'.

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